U.C.E BIOLOGY 2001 PAPER 1 QN 32

The information below is on feeding relationships in an ecosystem.

Lizards feed on praying mantis, butterflies and herbivorous bugs. Praying mantis feed on butterflies and herbivorous bugs. Butterflies and herbivorous bugs feed on grass.

a) Using a suitable method show the feeding relationship between

(i) All the organisms.

(ii) The praying mantis, herbivorous bug, lizards and grass.

b) How would the population of the organisms in (a) (i) above is affected if the praying mantis were removed from the ecosystem?

c) (i) State one group of important organisms that have not been included in the ecosystem.

(ii) Why are the organisms named in (c) (i) above important in an ecosystem?

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